#whatsapp-button{position:fixed;bottom:20px;right:20px;z-index:99999;display:inline-block}#whatsapp-button img{width:60px;height:60px;border-radius:50%;box-shadow:0 4px 6px rgba(0,0,0,.3);transition:transform .2s ease}#whatsapp-button:hover img{transform:scale(1.1)}@media (max-width:480px){#whatsapp-button{bottom:16px;right:16px}#whatsapp-button img{width:54px;height:54px}}